package com.mokairui.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * @Description com.sunshine.chat
 * @Author Mokairui
 * @Since 2022/1/11
 */
public class TextWebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {

        System.out.println("服务器收到消息 " + msg.text());

        // 回复消息
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器时间" + LocalDateTime.now() + msg.text()));
    }

    // 当 web 客户端连接后, 触发方法
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        // id 表示唯一的值, LongText 是唯一的
        System.out.println("handlerAdded 被调用 " + ctx.channel().id().asLongText());
        System.out.println("handlerAdded 被调用 " + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved 被调用 " + ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("发生异常 " + cause.getMessage());
        ctx.close(); // 关闭连接
    }
}
